How can we help?
You can also find more resources in our
Select a category
Something is confusing
Something is broken
I have a suggestion
What is your email?
What is 1 + 3?
rules for determining oxidation number
the oxidation number of any uncombined element is...
the oxidation number of a monatomic ion equals...
the charge on the ion
the more electronegative element in a binary compound is assigned the number equal to the charge it would have...
if it were an ion
the oxidation of fluorine in a compound is always...
oxygen has an oxidation number of negative two unless it is combined with F, when it is...or it is in a peroxide, when it is...
plus two, negative one
the oxidation of hydrogen in most of its compounds is plus one unless it combined with a metal in which case it is...
in compounds, the element of groups 1 and 2 as well as aluminum have oxidation number of...
plus one, plus two, and plus three respectively
the sum of the oxidation numbers of all atoms in a neutral compound is...
the sum of the oxidation number of all atoms in a polyatomic ion equals...
the charge of the ion